Russell, Bertrand, 1872-1970, author
George Allen and Unwin, 1956
Buku Teks
edited by Andrew N. Meltzoff and Wolfgang Prinz
Cambridge University Press, 2002
Buku Teks
Commager, Henry Steele, selector
Yale University Press, 1950
Buku Teks
Berger, Peter L., author
Penguin Books, 1977
Buku Teks
Brown, J.A.C. (James Alexander Campbell), 1911-1964, author
Watts & Co, 1946
Buku Teks